The relationship between the properties of montmorillonite and its m icroparticle retention effects on furnish together with the necessity of develop ing montmorillonite-based microparticle retention system, the factors affecting the application of it and the effects of using the microparticle system on rosi n sizing and paper strength was discussed.

This paper mainly describes the effect of the application of the binary paper strengthening system—cation\|polyacrylamide(CPAM) and carboxymethyl cellulose (CMC).

The mechanism which the anionic and cationic surface modifiers both modified the surface of GCC is researched,and studied the applying effect of modified GCC as paper filler The experiment indicated,the filler distinctly improved the filler retention rate and paper strengt

Analysis about the effect of the paper properties on the quality of printing products;

The influence of sucrose dosage on Portland cement's setting time,strength development,chemical binding water,ion concentrations in paste liquid phase of AFt content was studied.

The relationship between the fineness and particle gradient and the strength development of slag Portland cement with the addition of large volume slag was therefor determined.

This paper discussed the factors on the strength development of alkali-activated steel-blast furnace slagcement,such as the quantity of the mixing steel slag,the alkaline components and the curing condition,in both ofmacroscopic and microscopic ways.